libMesh
Public Member Functions | Protected Member Functions | Protected Attributes | Private Member Functions | List of all members
libMesh::OFFIO Class Reference

This class is responsible for reading an unstructured, triangulated surface in the standard OFF OOGL format. More...

#include <off_io.h>

Inheritance diagram for libMesh::OFFIO:
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Public Member Functions

 OFFIO (MeshBase &)
 Constructor. More...
 
virtual void read (const std::string &name) override
 Reads in an OFF OOGL data file based on the string you pass it. More...
 
bool is_parallel_format () const
 Returns true iff this mesh file format and input class are parallelized, so that all processors can read their share of the data at once. More...
 

Protected Member Functions

MeshBasemesh ()
 
void set_n_partitions (unsigned int n_parts)
 Sets the number of partitions in the mesh. More...
 
void skip_comment_lines (std::istream &in, const char comment_start)
 Reads input from in, skipping all the lines that start with the character comment_start. More...
 

Protected Attributes

std::vector< bool > elems_of_dimension
 A vector of bools describing what dimension elements have been encountered when reading a mesh. More...
 

Private Member Functions

void read_stream (std::istream &in)
 Implementation of the read() function. More...
 

Detailed Description

This class is responsible for reading an unstructured, triangulated surface in the standard OFF OOGL format.

Author
John W. Peterson
Date
2004 Reads OOF OOGL triangulated surface files.

Definition at line 39 of file off_io.h.

Constructor & Destructor Documentation

◆ OFFIO()

libMesh::OFFIO::OFFIO ( MeshBase mesh_in)
inlineexplicit

Constructor.

Takes a non-const Mesh reference which it will fill up with elements.

Definition at line 68 of file off_io.h.

68  :
69  MeshInput<MeshBase> (mesh_in)
70 {}

Member Function Documentation

◆ is_parallel_format()

bool libMesh::MeshInput< MeshBase >::is_parallel_format ( ) const
inlineinherited

Returns true iff this mesh file format and input class are parallelized, so that all processors can read their share of the data at once.

Definition at line 87 of file mesh_input.h.

References libMesh::MeshInput< MT >::_is_parallel_format.

87 { return this->_is_parallel_format; }
const bool _is_parallel_format
Flag specifying whether this format is parallel-capable.
Definition: mesh_input.h:130

◆ mesh()

MeshBase & libMesh::MeshInput< MeshBase >::mesh ( )
inlineprotectedinherited
Returns
The object as a writable reference.

Definition at line 178 of file mesh_input.h.

Referenced by libMesh::GMVIO::_read_one_cell(), libMesh::VTKIO::cells_to_vtk(), libMesh::ExodusII_IO::copy_elemental_solution(), libMesh::Nemesis_IO::copy_elemental_solution(), libMesh::ExodusII_IO::copy_nodal_solution(), libMesh::TetGenIO::element_in(), libMesh::UNVIO::elements_in(), libMesh::UNVIO::elements_out(), libMesh::VTKIO::get_local_node_values(), libMesh::ExodusII_IO::get_sideset_data_indices(), libMesh::UNVIO::groups_in(), libMesh::TetGenIO::node_in(), libMesh::UNVIO::nodes_in(), libMesh::UNVIO::nodes_out(), libMesh::VTKIO::nodes_to_vtk(), libMesh::Nemesis_IO::prepare_to_write_nodal_data(), libMesh::GMVIO::read(), libMesh::STLIO::read(), libMesh::Nemesis_IO::read(), libMesh::XdrIO::read(), libMesh::ExodusII_IO::read(), libMesh::CheckpointIO::read(), libMesh::VTKIO::read(), libMesh::STLIO::read_ascii(), libMesh::CheckpointIO::read_bcs(), libMesh::STLIO::read_binary(), libMesh::CheckpointIO::read_connectivity(), libMesh::ExodusII_IO::read_header(), libMesh::CheckpointIO::read_header(), libMesh::XdrIO::read_header(), libMesh::UCDIO::read_implementation(), libMesh::UNVIO::read_implementation(), libMesh::GmshIO::read_mesh(), libMesh::DynaIO::read_mesh(), libMesh::CheckpointIO::read_nodes(), libMesh::CheckpointIO::read_nodesets(), libMesh::CheckpointIO::read_remote_elem(), libMesh::XdrIO::read_serialized_bcs_helper(), libMesh::XdrIO::read_serialized_connectivity(), libMesh::XdrIO::read_serialized_nodes(), libMesh::XdrIO::read_serialized_nodesets(), libMesh::XdrIO::read_serialized_subdomain_names(), libMesh::ExodusII_IO::read_sideset_data(), read_stream(), libMesh::MatlabIO::read_stream(), libMesh::CheckpointIO::read_subdomain_names(), libMesh::STLIO::write(), libMesh::TetGenIO::write(), libMesh::Nemesis_IO::write(), libMesh::XdrIO::write(), libMesh::CheckpointIO::write(), libMesh::ExodusII_IO::write(), libMesh::GMVIO::write_ascii_new_impl(), libMesh::GMVIO::write_ascii_old_impl(), libMesh::GMVIO::write_binary(), libMesh::GMVIO::write_discontinuous_gmv(), libMesh::Nemesis_IO::write_element_data(), libMesh::ExodusII_IO::write_element_data(), libMesh::ExodusII_IO::write_elemsets(), libMesh::UCDIO::write_header(), libMesh::UCDIO::write_implementation(), libMesh::UCDIO::write_interior_elems(), libMesh::GmshIO::write_mesh(), libMesh::UCDIO::write_nodal_data(), libMesh::VTKIO::write_nodal_data(), libMesh::ExodusII_IO::write_nodal_data(), libMesh::ExodusII_IO::write_nodal_data_common(), libMesh::ExodusII_IO::write_nodal_data_discontinuous(), libMesh::UCDIO::write_nodes(), libMesh::CheckpointIO::write_nodesets(), libMesh::XdrIO::write_parallel(), libMesh::GmshIO::write_post(), libMesh::XdrIO::write_serialized_bcs_helper(), libMesh::XdrIO::write_serialized_connectivity(), libMesh::XdrIO::write_serialized_nodes(), libMesh::XdrIO::write_serialized_nodesets(), libMesh::XdrIO::write_serialized_subdomain_names(), libMesh::ExodusII_IO::write_sideset_data(), libMesh::UCDIO::write_soln(), and libMesh::CheckpointIO::write_subdomain_names().

179 {
180  libmesh_error_msg_if(_obj == nullptr, "ERROR: _obj should not be nullptr!");
181  return *_obj;
182 }
MeshBase * _obj
A pointer to a non-const object object.
Definition: mesh_input.h:123

◆ read()

void libMesh::OFFIO::read ( const std::string &  name)
overridevirtual

Reads in an OFF OOGL data file based on the string you pass it.

Implements libMesh::MeshInput< MeshBase >.

Definition at line 35 of file off_io.C.

References libMesh::Quality::name(), and read_stream().

Referenced by libMesh::NameBasedIO::read().

36 {
37  std::ifstream in (name.c_str());
38 
39  read_stream(in);
40 }
std::string name(const ElemQuality q)
This function returns a string containing some name for q.
Definition: elem_quality.C:42
void read_stream(std::istream &in)
Implementation of the read() function.
Definition: off_io.C:44

◆ read_stream()

void libMesh::OFFIO::read_stream ( std::istream &  in)
private

Implementation of the read() function.

This function is called by the public interface function and implements reading the file.

Definition at line 44 of file off_io.C.

References libMesh::MeshBase::add_elem(), libMesh::MeshBase::add_point(), libMesh::Elem::build(), libMesh::MeshBase::clear(), libMesh::EDGE2, libMesh::libmesh_assert(), libMesh::MeshInput< MT >::mesh(), libMesh::MeshInput< MeshBase >::mesh(), libMesh::MeshBase::node_ptr(), libMesh::Real, libMesh::MeshBase::set_mesh_dimension(), and libMesh::TRI3.

Referenced by read().

45 {
46  // This is a serial-only process for now;
47  // the Mesh should be read on processor 0 and
48  // broadcast later
49  libmesh_assert_equal_to (this->mesh().processor_id(), 0);
50 
51  // Get a reference to the mesh
52  MeshBase & the_mesh = MeshInput<MeshBase>::mesh();
53 
54  // Clear any existing mesh data
55  the_mesh.clear();
56 
57  // Check the input buffer
58  libmesh_assert (in.good());
59 
60  unsigned int nn, ne, nf;
61 
62  std::string label;
63 
64  // Read the first string. It should say "OFF"
65  in >> label;
66 
67  libmesh_assert_equal_to (label, "OFF");
68 
69  // read the number of nodes, faces, and edges
70  in >> nn >> nf >> ne;
71 
72 
73  Real x=0., y=0., z=0.;
74 
75  // Read the nodes
76  for (unsigned int n=0; n<nn; n++)
77  {
78  libmesh_assert (in.good());
79 
80  in >> x
81  >> y
82  >> z;
83 
84  the_mesh.add_point ( Point(x,y,z), n );
85  }
86 
87  unsigned int nv, nid;
88 
89  // Read the elements
90  for (unsigned int e=0; e<nf; e++)
91  {
92  libmesh_assert (in.good());
93 
94  // The number of vertices in the element
95  in >> nv;
96 
97  libmesh_assert(nv == 2 || nv == 3);
98  if (e == 0)
99  {
100  the_mesh.set_mesh_dimension(cast_int<unsigned char>(nv-1));
101  if (nv == 3)
102  {
103 #if LIBMESH_DIM < 2
104  libmesh_error_msg("Cannot open dimension 2 mesh file when configured without 2D support.");
105 #endif
106  }
107  }
108 
109  std::unique_ptr<Elem> elem;
110  switch (nv)
111  {
112  case 2:
113  elem = Elem::build(EDGE2);
114  break;
115 
116  case 3:
117  elem = Elem::build(TRI3);
118  break;
119 
120  default:
121  libmesh_error_msg("Unsupported nv = " << nv);
122  }
123 
124  elem->set_id(e);
125 
126  for (unsigned int i=0; i<nv; i++)
127  {
128  in >> nid;
129  elem->set_node(i, the_mesh.node_ptr(nid));
130  }
131 
132  the_mesh.add_elem(std::move(elem));
133  }
134 }
static std::unique_ptr< Elem > build(const ElemType type, Elem *p=nullptr)
Definition: elem.C:444
libmesh_assert(ctx)
DIE A HORRIBLE DEATH HERE typedef LIBMESH_DEFAULT_SCALAR_TYPE Real

◆ set_n_partitions()

void libMesh::MeshInput< MeshBase >::set_n_partitions ( unsigned int  n_parts)
inlineprotectedinherited

Sets the number of partitions in the mesh.

Typically this gets done by the partitioner, but some parallel file formats begin "pre-partitioned".

Definition at line 101 of file mesh_input.h.

References libMesh::MeshInput< MT >::mesh().

Referenced by libMesh::Nemesis_IO::read(), and libMesh::XdrIO::read_header().

101 { this->mesh().set_n_partitions() = n_parts; }
unsigned int & set_n_partitions()
Definition: mesh_base.h:1865

◆ skip_comment_lines()

void libMesh::MeshInput< MeshBase >::skip_comment_lines ( std::istream &  in,
const char  comment_start 
)
protectedinherited

Reads input from in, skipping all the lines that start with the character comment_start.

Definition at line 187 of file mesh_input.h.

Referenced by libMesh::TetGenIO::read(), and libMesh::UCDIO::read_implementation().

189 {
190  char c, line[256];
191 
192  while (in.get(c), c==comment_start)
193  in.getline (line, 255);
194 
195  // put back first character of
196  // first non-comment line
197  in.putback (c);
198 }

Member Data Documentation

◆ elems_of_dimension

std::vector<bool> libMesh::MeshInput< MeshBase >::elems_of_dimension
protectedinherited

The documentation for this class was generated from the following files: